High accuracy reconstruction platform for GNSS/Pseudolite hybrid constellation simulator

This paper describes a high accuracy reconstruction platform for GNSS/Pseudolite hybrid constellation simulator. GNSS/ Pseudolite hybrid constellation simulator is a high accuracy reconstruction signal generator platform which is configured to meet specific test needs. Multiple reconstructive modules can be combined to form an integrated, coherent signal generator if more signals or outputs are required. The extensive range of system allows users to tailor their system for their specific needs today and in the future. The paper introduces the simulator's detail design of framework and element. A high resolution signal delay algorithm based on multilevel re-construct delay filter is investigated, and test method and result are given in this paper. Finally, the system performance evaluation, algorithm of high accuracy delay and parameter estimation validation are given. The main performance is as follows: pseudorange uncertainty is 1mm, zero stability is 1cm, inter-channel bias is 1cm, and coherence between different frequencies is 2cm.